2. In a survey, half of the students walk to school and the other half take the bus. Of the students who take the bus to school, 40% play sports. Complete the tree diagram and the calculation to find the probability below. 0.35 sports P(plays sports and takes bus) = P(sports | bus) P( walk 0.5 0.65 no sports = (0.4)( sports bus no sports

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.7: Probability And Odds
Problem 11E
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Question
What’s the answer for #2 and 3A and 3B
t change this document.
Q Q
c. Choose the correct symbol to make the statement true.
Events A and B are dependent because P(1|B) (=, #) P(11A)
2. In a survey, half of the students walk to school and the other half take the bus.
Of the students who take the bus to school, 40% play sports. Complete the tree
diagram and the calculation to find the probability below.
0.35
sports
P(plays sports and takes bus) = P(sports | bus) P(
0.5 walk
0.65
no sports
= (0.4)(
sports
bus
no sports
3. Suppose 60% of the freshmen at your school take a course in compass
navigation. The probability that a freshman selected at random did not get lost
on the class hike is 90%. The probability that a freshman selected at random
took the course and did not get lost is 50%.
a. What is P(did not get lost | took the course)?
P(took the course and did not get lost)
P(took the course)
P(did not get lost | took the course) =
0.5
b. Kei says P(took the course I did not get lost) is 1. Correct Kei's error.
Transcribed Image Text:t change this document. Q Q c. Choose the correct symbol to make the statement true. Events A and B are dependent because P(1|B) (=, #) P(11A) 2. In a survey, half of the students walk to school and the other half take the bus. Of the students who take the bus to school, 40% play sports. Complete the tree diagram and the calculation to find the probability below. 0.35 sports P(plays sports and takes bus) = P(sports | bus) P( 0.5 walk 0.65 no sports = (0.4)( sports bus no sports 3. Suppose 60% of the freshmen at your school take a course in compass navigation. The probability that a freshman selected at random did not get lost on the class hike is 90%. The probability that a freshman selected at random took the course and did not get lost is 50%. a. What is P(did not get lost | took the course)? P(took the course and did not get lost) P(took the course) P(did not get lost | took the course) = 0.5 b. Kei says P(took the course I did not get lost) is 1. Correct Kei's error.
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